JPH08203747A - Connection structure of coil terminal in coil bobbin - Google Patents

Abstract

PURPOSE: To improve the efficiency of winding work by preventing the coil disconnection at the time of winding a coil on a coil bobbin. CONSTITUTION: A pair of coil terminal mounts 1d and 1e are made at one flange of a coil bobbin 1 which has flanges 1b and 1c at both ends of a drum 1a. Metallic coil terminals 3 are made each at these mounts. Wrapping poles 1f and 1g are projected at the side of each mount, and the lead 2a of the coil 2 is wound by a specified number of times on the tip 3b of a coil terminal 3, and further it is wound on the drum after being wound by a specified number of times on the wrapping pole 1f. Even if tension works on a wire 2 at the time of winding, strong force does not work on the coil terminal being a directly sharp edge, because one end of the lead 2a is wound on the coil terminal via the support at the wrapping pole. Therefore, the disconnection of the coil is prevented, and the time and labor in connection caused by the wire breaking is saved, so the efficiency of wiring improves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire connecting structure for coil terminals in a coil bobbin.

[0002]

2. Description of the Related Art As an example of a coil bobbin assembly used for a small motor such as a timepiece in the prior art, as shown in FIG. 2, a coil 12 and a coil formed by winding a wire around a coil bobbin 11 made of a plastic molded product. And the terminal 13. The lead-out portions 12a and 12b at both ends of the coil 12 are wound a predetermined number of times around the coil terminals 13 and 13 mounted on the coil terminal mounting portions 11d and 11e provided on the one collar portion 11b, and then the terminals are coil terminals. It is stuck to.

In the process of winding a wire around the coil bobbin 11, first, one end 12a of the wire is connected to one coil terminal 1
The wire is guided to the winding body 11a of the coil bobbin after being wound a predetermined number of times around the tip end portion 13b of No. 3, and is wound there a predetermined number of times. Next, the other end 12b of the wire is pulled out and wound around the tip 13b of the other coil terminal a predetermined number of times and then cut. Finally, the coil bobbin assembly is completed by soldering and fixing the ends of the wires to the coil terminals.

[0004]

As described above, in the winding work on the coil bobbin 11, one end of the coil 12 is wound around the tip end portion 13b of one coil terminal and then the winding barrel portion 11 is wound.
The wire is wound around a. However, in order to wind the wire around the winding drum portion with a predetermined density, it is necessary to apply a certain tension to the wire. However, coil terminal 1
Since 3 is made by pressing a thin plate of brass, phosphor bronze, or the like, the ridge line of the portion around which the coil is wound has a sharp edge. For this reason, if tension acts when the coil is wound around the winding drum portion, there is a risk that the wire is cut at the edge portion and is broken. If a wire breakage occurs during the winding work, it is naturally necessary to take care for the wire connection, which causes the work efficiency to decrease.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the efficiency of winding work by preventing coil breakage during winding work on a coil bobbin.

[0006]

In order to achieve the above object, the present invention has a coil bobbin having a collar at both ends, wherein a coil is wound around the coil bobbin, and one of the collars has a pair of coils. A coil terminal mounting part is formed, and each coil terminal mounting part is mounted with a coil terminal so that the tip of the coil terminal is protruded. The present invention relates to a wire connection structure of coil ends in a coil bobbin in which the ends of the respective lead-out parts are fixed. The feature of the present invention is that the outer surface of the coil terminal mounting portion provided on one of the flange portions of the coil bobbin is
A pair of twisted pillars are provided so as to project, and the lead-out portion of each coil is located around each twisted pillar for a predetermined number of times and then wound around the coil terminal.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a coil bobbin assembly to which a connection structure of coil ends of a coil bobbin of the present invention is applied connects a coil bobbin 1, a coil 2 wound around the coil bobbin, a lead wire of the coil and an external circuit. It is constituted by the coil terminal 3.

The coil bobbin 1 is made of a plastic molded product, and a wire such as an enamel wire forming the coil 2 is wound around the winding drum portion 1a many times. A pair of coil terminal mounting portions having a rectangular front shape on the upper half of the outer surface of one of the collars 1b and 1c provided at both ends of the winding body 1a. 1d and 1e are formed so as to project forward.

The coil terminals 3 and 3 are mounted on the mounting portions 1d and 1e so as to vertically pass therethrough. The coil terminal 3 is formed by pressing a phosphor bronze thin plate, and has a substantially L-shaped cross section.
The central portion of the vertical portion is embedded in the mounting portion by press fitting, and the respective tip portions 3b, 3b project to the upper end of the mounting portion.

The horizontal portion 3c of the coil terminal 3 extends forward from the vicinity of the bottom portion of the coil bobbin 1, and its front end portion is bent downward so that its tip portion is located below the bottom surface position of the coil bobbin. is there.

Barrels 1f and 1g are provided on the outer surfaces of the mounting portions 1d and 1e, respectively. Each pillar
The f and 1g are cylindrical bodies having a height of about 1.5 times the diameter, and are integrally formed with the coil bobbin 1.

The wire forming the coil 2 has one lead portion 2a wound around the tip portion 3b of one coil terminal a predetermined number of times, and then wound around the twisted column 1f a predetermined number of times and then wound. It is wound around the body 1a. Winding body 1
The other end of the coil 2 that has been wound around a is the other lead-out portion 2
b, which is wound around the other twisted column 1g a predetermined number of times and then wound around the tip portion 3b of the coil terminal 3 a predetermined number of times. The lead-out portion 2b is cut at a predetermined position, and its end 2d is fixed to the tip portion 3b of the coil terminal 3 by soldering.

The mounting portions 1d, 1 at the center of the bottom of the collar portion 1b
A mounting portion 1h is provided below the space between e so as to project forward, and a through hole 1i for screwing to a substrate (not shown) is provided in this mounting portion.

The winding work of the coil 2 on the coil bobbin 1 is performed by using a winding machine. First, a wire is wound around the tip portion 3b of one coil terminal 3 a predetermined number of times, and then the coil is guided to the side of the coil bobbin 1 and wound around one of the barb posts 1f a predetermined number of times (twice in this embodiment). It is guided to the winding drum portion 1a and wound around the winding drum portion 1a a predetermined number of times.

The coil is wound around the winding drum portion 1a while a constant tension is applied to the wire, but the supporting end portion at the beginning of the winding operation does not have a sharp edge.
Since the wire is wound around f and is not supported by the coil terminal having an edge, even if a tension is applied to the wire, a strong tension does not act on the wire on the edge portion, so that the wire is not cut.

After the winding process of the coil around the winding drum portion 1a is completed, the lead-out portion 2b is wound around the tip portion 3b of the other coil terminal 3 a predetermined number of times so as not to unravel.
When the winding is completed, remove it from the winding machine,
2d is soldered to the tip portions 3b and 3b of the coil terminal,
The coil bobbin assembly is completed.

In this embodiment, the columnar column is formed in a cylindrical shape, but it may be formed in a polygonal cross section such as a quadrangle or a hexagon. Whatever the shape, it is important not to directly support the coil lead-out part on the sharp edge part such as the coil terminal, and to pass the wire on which tension acts through the barbed column where there is no risk of cutting the wire once. The coil terminal portion.

[0018]

According to the present invention, since the barb post is provided on the outer surface of the terminal mounting part of the coil bobbin, the barb is wound after the coil lead-out part is wound around the coil terminal during the winding work. By winding around the pillar, disconnection of the coil in the winding can be prevented. As a result, the efficiency of the coil winding work is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a perspective view showing a conventional technique.

[Explanation of symbols]

 1 Coil bobbin 1a Winding drum part 1b, 1c Collar part 1d, 1e Coil terminal mounting part 1f, 1g Barbed pillar 2 Coil (wire) 2a, 2b Lead-out part 2c, 2d Terminal 3 Coil terminal 3b Tip part

Claims (1)

[Claims] 1. A coil is wound around a winding body of a coil bobbin having collars at both ends, and one of the collars has one coil.
A pair of coil terminal mounting portions are formed, and coil terminals are mounted on the respective coil terminal mounting portions such that the tip portions of the coil terminal mounting portions are protruded. In the wire connecting structure of the coil terminals in the coil bobbin formed by fixing the ends of the respective lead-out portions to the coil terminals after winding, in the outer surface of each of the coil terminal mounting portions, each of the barb posts is projected. Each of the lead-out portions is wound around the barbed column a predetermined number of times and then wound around the coil terminal, wherein the coil terminal connection structure of the coil bobbin is provided.